Directional drilling assembly



FIG. 1 is a front elevation view of directional drilling assembly showing our new design;

FIG. 2 is a left side elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a cross-sectional view thereof taken along line 5-5 in FIG. 1; and,

FIG. 6 is a cross-sectional view thereof taken along line 6-6 in FIG. 1.

The broken lines in the drawings illustrate portions of the directional drilling assembly that form no part of the claimed design. 

CLAIM The ornamental design for a directional drilling assembly, as shown and described. 